Returns a two-element array of iterators. The first element, yes, is an
iterable of all items from the original iterable that pass the test function.
The second element, no, contains all the failing items.

Note: this function will buffer the skipped items in the second iterable to be
realized. That is, if you evaluate the yes iterable all at once first, all
failing elements will be buffered in no until it is iterated. Usually realizing
the array is the goal, so keeping the elements in memory shouldn't be an issue.

If memory is an issue, consider taking one element at a time from yes and
no, which will buffer at most N items, where N is the largest run of
all-passing or all-failing items.